refactor: centralize typing mode signals

src/auto-reply/reply/typing-mode.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, it } from "vitest";
 
-import { resolveTypingMode } from "./typing-mode.js";
+import { createMockTypingController } from "./test-helpers.js";
+import { createTypingSignaler, resolveTypingMode } from "./typing-mode.js";
 
 describe("resolveTypingMode", () => {
   it("defaults to instant for direct chats", () => {
@@ -66,3 +67,75 @@ describe("resolveTypingMode", () => {
     ).toBe("never");
   });
 });
+
+describe("createTypingSignaler", () => {
+  it("signals immediately for instant mode", async () => {
+    const typing = createMockTypingController();
+    const signaler = createTypingSignaler({
+      typing,
+      mode: "instant",
+      isHeartbeat: false,
+    });
+
+    await signaler.signalRunStart();
+
+    expect(typing.startTypingLoop).toHaveBeenCalled();
+  });
+
+  it("signals on text for message mode", async () => {
+    const typing = createMockTypingController();
+    const signaler = createTypingSignaler({
+      typing,
+      mode: "message",
+      isHeartbeat: false,
+    });
+
+    await signaler.signalTextDelta("hello");
+
+    expect(typing.startTypingOnText).toHaveBeenCalledWith("hello");
+    expect(typing.startTypingLoop).not.toHaveBeenCalled();
+  });
+
+  it("signals on reasoning for thinking mode", async () => {
+    const typing = createMockTypingController();
+    const signaler = createTypingSignaler({
+      typing,
+      mode: "thinking",
+      isHeartbeat: false,
+    });
+
+    await signaler.signalReasoningDelta();
+
+    expect(typing.startTypingLoop).toHaveBeenCalled();
+  });
+
+  it("refreshes ttl on text for thinking mode", async () => {
+    const typing = createMockTypingController();
+    const signaler = createTypingSignaler({
+      typing,
+      mode: "thinking",
+      isHeartbeat: false,
+    });
+
+    await signaler.signalTextDelta("hi");
+
+    expect(typing.refreshTypingTtl).toHaveBeenCalled();
+    expect(typing.startTypingOnText).not.toHaveBeenCalled();
+  });
+
+  it("suppresses typing when disabled", async () => {
+    const typing = createMockTypingController();
+    const signaler = createTypingSignaler({
+      typing,
+      mode: "instant",
+      isHeartbeat: true,
+    });
+
+    await signaler.signalRunStart();
+    await signaler.signalTextDelta("hi");
+    await signaler.signalReasoningDelta();
+
+    expect(typing.startTypingLoop).not.toHaveBeenCalled();
+    expect(typing.startTypingOnText).not.toHaveBeenCalled();
+  });
+});